My little brother's 6 year old pitty was just diagnosed with having a heart-worm in her eye. Apparently this is extremely rare, and we are shocked as she has never once had a positive heart-worm test. The doc's have given us 3 options, either have the extremely costly surgery to have the worm removed and try to save her eye, have her eye removed or have her "put down". we want to either have the surgery or have the eye removed but are concerned with her having extreme aggression issues once this is done. She already has semi aggression issues when it comes to the other dogs in the home, and we are worried that this will intensify. Has anyone ever dealt with their pit losing an eye and having any type of temperament issues?

Um, what? I am extremely confused by your post. Heartworms do NOT lodge in the eye, they live in the heart and will spill over into the lungs in heavy infestations. They don't live outside of those areas.
Dog aggression issues are quite common in many dogs of terrier descent, especially those breed for combat with other dogs. Sounds normal in that respect. Removing her eye (for whatever medical reason it is needed) will not effect that in either direction

Um, what? I am extremely confused by your post. Heartworms do NOT lodge in the eye, they live in the heart and will spill over into the lungs in heavy infestations. They don't live outside of those areas.
Dog aggression issues are quite common in many dogs of terrier descent, especially those breed for combat with other dogs. Sounds normal in that respect. Removing her eye (for whatever medical reason it is needed) will not effect that in either direction

Yes heartworms can present in the eye. FYI

Severely infected dogs may show signs of heart failure, fatigue, coughing, rapid heart beat, enlarged liver, loss of appetite, fainting, or jaundice. Occasionally, heartworms may also be present in the eyes, abdominal cavity, and even the spinal cord.

I'm sorry you're having to go through this especially since the prevention of Heartworms is so simple.

However having an eye removed if it's necessary could present more problems if she is already DA (dog aggressive). It will not make her more DA but could cause problems where she is more jumpy and in turn more problems with the other dogs in the house. Some dogs who lose an eye can be startled by someone or another dog on the blind side and some dogs will take that fear and strike out. I am a dog trainer and behaviorist and have seen this many times. Now the dogs temperament issue was already there to begin with but the loss of an eye (loss of sight) could aid in the grumpiness of the dog.

Now if it was my dog, depending on the cost and outcome I might opt to have the eye removed. But your problem lies in the temperament of the dog which should have little to do with the surgery. So the bigger question is what problems with the other dogs is she having? Then we can help on some tips to make peace in the house surgery or no surgery.

Yes, I discounted the advanced cases where worms start to migrate into other areas that they can (barely) survive, since the OP stated the dog had clear heartworm tests up until the discovery of 'a heartworm in the eye) The OP made no reference to the dog now being heartworm INFESTED and did not talk of having to treat for heartworm after the eye removal. The thought of just ONE heartworm lodged in a dogs eye kind of freaks me out.

Um, what? I am extremely confused by your post. Heartworms do NOT lodge in the eye, they live in the heart and will spill over into the lungs in heavy infestations. They don't live outside of those areas.
Dog aggression issues are quite common in many dogs of terrier descent, especially those breed for combat with other dogs. Sounds normal in that respect. Removing her eye (for whatever medical reason it is needed) will not effect that in either direction

That's not what you said not trying to argue but just pointing out before you say something with such certainty try google lol

Heartworms are a type of roundworms and do you know kids go blind every year from round worms in the eye due to dogs not being wormed? Just another crazy eye fact lol.

I know tapeworms can migrate and in wierd places - like the brain. I saw a 'monsters inside me' show in which worm(s) were in the eye... what a crazy phenomenon!! If there is no viable treatment and and the other option is PTS, get that eye out of there!!!